diff options
| author | Ingo Molnar | 2009-02-26 13:02:23 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2009-02-26 13:02:23 +0100 |
| commit | 8e818179eb9e8f9e44d8410dd2a25077d026a08e (patch) | |
| tree | 7d08afd30c95c04129c20693d974a18799caeb5a /kernel/sched.c | |
| parent | perfcounters/powerpc: Add support for POWER5 processors (diff) | |
| parent | Merge branches 'x86/apic', 'x86/defconfig', 'x86/memtest', 'x86/mm' and 'linu... (diff) | |
| download | kernel-qcow2-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.tar.gz kernel-qcow2-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.tar.xz kernel-qcow2-linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.zip | |
Merge branch 'x86/core' into perfcounters/core
Conflicts:
arch/x86/kernel/apic/apic.c
arch/x86/kernel/irqinit_32.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 83b68ff6df80..16b73635f28f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -7026,20 +7026,26 @@ static void free_rootdomain(struct root_domain *rd) static void rq_attach_root(struct rq *rq, struct root_domain *rd) { + struct root_domain *old_rd = NULL; unsigned long flags; spin_lock_irqsave(&rq->lock, flags); if (rq->rd) { - struct root_domain *old_rd = rq->rd; + old_rd = rq->rd; if (cpumask_test_cpu(rq->cpu, old_rd->online)) set_rq_offline(rq); cpumask_clear_cpu(rq->cpu, old_rd->span); - if (atomic_dec_and_test(&old_rd->refcount)) - free_rootdomain(old_rd); + /* + * If we dont want to free the old_rt yet then + * set old_rd to NULL to skip the freeing later + * in this function: + */ + if (!atomic_dec_and_test(&old_rd->refcount)) + old_rd = NULL; } atomic_inc(&rd->refcount); @@ -7050,6 +7056,9 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd) set_rq_online(rq); spin_unlock_irqrestore(&rq->lock, flags); + + if (old_rd) + free_rootdomain(old_rd); } static int __init_refok init_rootdomain(struct root_domain *rd, bool bootmem) |